Brennan is an Irish surname which is an Anglicised form of two different Irish language surnames—Ó Braonáin and Ó Branáin. Historically, one source of the surname was the prominent clan Ua Braonáin (O'Brennan) of Uí Duach (Idough) in Osraige who were a junior Dál Birn sept stemming from a younger son of Cerball mac Dúnlainge (d.888). Recent surname evaluations highlighted the geographic consistency of this lineage in the barony of Idough.
The Gaelic surname Ó Braonáin, means "descendant of Braonán". The personal name Braonán is derived from a word which means "moisture", "drop". The Gaelic surname Ó Branáin, means "descendant of Branán". The personal name Branán means "little raven". Brennan is also a given name.
Deputy Andy Brennan, a fictional character from the television series Twin Peaks
Arthur Brennan (1881–1931), Australian rules footballer
Barbara Brennan (born 1939), an American author and spiritual healer
Brian Brennan (born 1962), a former professional American football player
Bridin Brennan (born 1974), an Irish pop singer
Barry Brennan (born 1975), an Irish man of many talents
T. Casey Brennan (born 1948), an American comic book writer
Christine Brennan (born 1958) a sports columnist for the USA Today
Christopher Brennan (1870–1932), Australian poet and scholar
Ciarán Brennan (born 1954), an Irish singer and musician
Colt Brennan (born 1983), an American football player
Daniel Brennan, Baron Brennan
Dean Brennan, Irish footballer
Denis Brennan, Roman Catholic Bishop of Ferns
Don Brennan (Coronation Street Character)
Don Brennan (Cricketer)
Duncan Brannan, voice actor sometimes credited as Duncan Brennan
Eddie Brennan
Edward A. Brennan
Eileen Brennan (1932–2013), American actress
Enya Brennan, the singer Enya
Frank Brennan (disambiguation)
Frederick Hazlitt Brennan (1901–1962) an American screenwriter
Fredrick Brennan an American computer programmer
Gary Brennan Manager of St. Patrick's G.A.A. Under 15's. Also known as the "Flying Sex Tempest of South Idaho"
Geoffrey Brennan, professor of philosophy
Gerard Brennan, Justice and later Chief Justice of the High Court of Australia
Gomeo Brennan (born 1939), Bahamian boxer of the 1950s, '60s and '70s
Ian Brennan (footballer) (born 1953), English former footballer
Ian Brennan (producer), American music producer
Ian Brennan (sculptor) (born 1950), British sculptor
Ian Brennan (writer) (born 1978), television writer, actor, producer and director
Ivy Brennan
J. Keirn Brennan (1873–1948), American songwriter
James Alexander Brennan (1885–1956), American songwriter
Jack Brennan, a military aide to President Richard M. Nixon
Jack Brennan (1863–1914), American baseball player
Jacob Brennan (born 1990), Australian rules footballer
James F. Brennan
James Herbert Brennan
Jared Brennan
Jim Brennan is a Football (soccer) player
John G. Brennan
John O. Brennan CIA director
Joseph Brennan (basketball) (1900–1989), American basketball player
Joseph Brennan (civil servant)
Joseph Brennan (Irish politician)
Joseph E. Brennan, governor of Maine
Joseph Charles Brennan
Joseph Payne Brennan (1918–1990), American poet/author; WWII Veteran, ETO
Joseph Vincent Brennan, a Roman Catholic Bishop
Kathleen Brennan, American musician
Keith Brennan (1915–1985), Australian diplomat
Kevin Brennan (comedian) (born 1960), American comedian
Kevin Brennan (politician) (born 1959), British Labour Party politician and MP
Killian Brennan
Kip Brennan
Kitty Brennan, American juist
Lee Brennan, singer
Bishop Len Brennan, a fictional character from the television series Father Ted
Les Brennan, Australian rugby league footballer
Louis Brennan, 19th century inventor
M. C. Brennan
Maeve Brennan
Margaret Brennan
Margaret Brennan (nun)
Martin Brennan (disambiguation)
Matt Brennan
Matt Brennan (American football)
Maurice B. Brennan, American politician
Michael Brennan (field hockey player)
Michael Brennan (Fine Gael)
Michael Brennan (Progressive Democrats)
Michael F. Brennan
Mitch Brennan, Australian rugby league footballer
Moya Brennan, singer and the sister of Enya
Neal Brennan, American writer, stand-up comedian, television director and producer
Nick Brennan
Nicky Brennan
Owen Brennan, New Orleans restaurateur
Paddy Brennan (born May 1981), Irish jockey
Patricia Brennan
Patricia Flatley Brennan
Patrick Brennan (police officer)
Paudge Brennan
Paul Brennan (disambiguation)
Peter J. Brennan
Pól Brennan
Reed Brennan, a fictional character from the book series Private
Richard Brennan, Sr., restaurateur in New Orleans: the Commander's Palace
Robert Brennan (disambiguation)
Ralph Brennan
Scott Brennan (disambiguation)
Séamus Brennan (1948–2008), Fianna Fáil politician
Síle Ní Bhraonáin (born 1983), television presenter
Shay Brennan
Stephen Brennan (born 1983), Irish footballer
Steve Brennan (born 1951), English darts player
Steve Brennan (footballer, born 1958) (1958–2015), English footballer
Temperance "Bones" Brennan, a fictional character from the television series Bones
Thomas Brennan (footballer) (1911–n/a), Scottish footballer
Thomas Brennan (Irish Land League) (1853–1912), Irish politician
Thomas Brennan (Fianna Fáil) (died 1953), Irish politician
Thomas E. Brennan (born 1929), American jurist, former Chief Justice of the Michigan Supreme Court
Thomas Francis Brennan (1853–1937), American Catholic bishop; 1st Catholic bishop of Dallas 1891–1893
Tom Brennan (politician)
Tom Brennan, American sportscaster and former University of Vermont basketball coach
Tom Brennan (basketball, born 1930) (1930–1990), basketball player for Villanova University and the Philadelphia Warriors
Tom Brennan, 1980s baseball player
Tom Brennan (ice hockey) (1922–2003), American ice hockey player for Boston Bruins
Thomas Michael Brennan (2002-present)
Ursula Brennan (born 1952), British civil servant
Vincent M. Brennan (1890–1959), US Representative from Michigan
Walter Brennan, actor
Willy Brennan, Irish highwayman
William J. Brennan, Jr., 20th century justice on the US Supreme Court
William John Brennan (1938–2013), Australian Roman Catholic bishop
Brennan (surname) Wikipedia (Text) CC BY-SA